NAT Slow with High Ping

Hey Guys,

Stange issue I’m having here. I have a 50Mbps ethernet service connected to my RB2011 on ether1-gateway.

When I ping the next hop I am getting very predictable pings, though through NAT my speed is around 2Mbps and ping time is all over the place (between 1ms and 200ms).

Ive tried resetting NAT counters and have been over the config a million times. Wouldn’t mind some input here.

#      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 A S  0.0.0.0/0                          **.6.8.45                1

 #     NAME                                TYPE         MTU L2MTU  MAX-L2MTU MAC-ADDRESS
 0  R  ether1-gateway                      ether       1500  1598       4074 D4:CA:6D:87:B2:7E

/ip address
add address=**.6.8.46/30 interface=ether1-gateway network=**.6.8.44

/ip route
add distance=1 gateway=***.6.8.45

/ip firewall filter
add chain=input comment="default configuration" protocol=icmp
add chain=input comment="default configuration" connection-state=established
add chain=input comment="default configuration" connection-state=related
add action=drop chain=input comment="default configuration" in-interface=ether1-gateway
add chain=forward comment="default configuration" connection-state=established
add chain=forward comment="default configuration" connection-state=related
add action=drop chain=forward comment="default configuration" connection-state=invalid

/ip firewall nat
add action=masquerade chain=srcnat out-interface=ether1-gateway

Any ideas?

You should also allow your internal network in your firewall filter forward chain.